Temperature-controller for carbureters.



APPLICATION IILED JULY 5, 1911.

Patented Mar. 31, 1914 wine 6666.

T 0FFIE JAMES B. LUND, OF CHICAGO, ILLINOIS.

TEMPERATURE-CONTROLLER FOR CABBURETEBS.

Specification of Letters Patent.

Patented. Mar. 31, 1914..

Application filed July 5, 1911. Serial No. 636,838.

To all whom it may concern Be it known that 1, JAMES B. LUND, a citizenof the United States, and resident of Chicago, in the county of Cook andState of Illinois, have invented certain new and useful Improvements inTemperature- Controllers for Carbureters, of which the following is aspecification.

This invention relates in general to carbureters and more particularlyto an attachment therefor adapted to automatically control thetemperature of the air delivered to the carbureter whereby a completeand efiicient vaporization of the gasolene is effected.

One of the objects of my present invention is the provision ofa deviceof this character having two air intakes for the carbureter, one of saidintakes communicating directly with the atmosphere for supplying coolair and the other, communicating with an air heater bymeans of which theair drawn into the carbureter, is heated considerably above atmospherictemperature, and to provide temperature controlled mechanism forautomatically regulating the relative amounts of cool and hot airdelivered to the carbureter so that the air which is finally deliveredto the carbureter is of a uniform predetermined temperature.

This invention relates only to temperature controlled mechanism forregulating the relative amounts of hot and cold air delivered to thecarbureter. Mechanism for this purpose, adapted to be controlled by bothtemperature and pressure, constitutes the subject-matter of U. S. PatentNo. 1,017 ,572, granted to me February 13, 1912, on an applicationcopending herewith.

My invention will be best understood by reference to the followingdescription when taken in connection with the accompanying drawingsillustrating those forms of my invention which at present seempreferable.

Referring to the drawings Figure 1 is a side elevation partially insection of a carbureter equipped with my invention; Fig. 2 is a planview of my improved air heating device; and Fig. 3 is a sectional viewtaken on the line 33 of Fig. 2.

Referring to the drawings 10 designates a carbureter which may be of anywell known or preferred type, the particular form or character of thecarbureter employed being immaterial so far as the present invention isconcerned. The air is delivered to the carburetor through an air supplypipe 11 which is connected at its intake end with a heater 12. Thisheater as shown in Figs. 2 and 3 comprises a section of pipe 131nterposed in the exhaust pipe 14 from the engine and having a drum 15surrounding the section and connected therewith by a plurality of ribsor partitions 16. The drum and the compartments formed by the partitionsare open at the ends and, as will be evident from Fig. 2, the partitionsdo not extend from end to end of the drum but are cut away at theircentral portion to leave a circular chamber surrounding the pipe 13 andcommunicating with the air supply pipe 11. It will be manifest that theair which is drawn into the heater around the hot exhaust pipe will beheated to a relatively high temperature before it is delivered to thecarbureter through the supply pipe 11.

The supply pipe 11 is preferably square throughout a portion of its lenth and this square portion is provided wit a port 17 communicatingdirectly with the atmosphere. Adjacent this ort there is pivoted at 18 ashutter 19 which raised position to close the port and when in loweredposition to close the pipe 11 between the port and the heater. When theshutter is partially opened it will be evident the air will be drawninto the carbureter both directly from the atmosphere through the port17 and also through the heater 12. By regulating the posit-ion of theshutter the proper proportions of air will be admitted through the port17 and through the heater to produce a mixture of air of the properpro-determined temperature which will give the most satisfactory resultsin the carbureter.

As shown in Fig. 1 the pipe leading from the carbureter to the manifold20 which delivers the gas to the engine cylinders is enlarged asindicated at 21 between the throttle valve (not shown) and the manifoldand' in this enlarged portion there is mounted an element 22 of anypreferred type or construction adaptedto expand and contract underchanges in temperature. Any well known or approved element may beemployed in this connection, but in the present instance I haveillustrated a thermostat designed to respond readily to changes in temisadapted when in ment and the shutter.

perature so that the temperature of the gas delivered to the engine willbe substantially uniform. From the side of the enlarged section of pipe21 projects a bearing 23 in which is slidingly mounted a link or rod 24connected at its inner end to the element 22 and at its outer end to onearm of a bell crank lever 25 pivotally mounted.- upon a suitable Theother arm of the bracket 26. lever 25 is connected by a link 27Stationary bell crank with the shutter 19. The rod 2a is preferdottedline position shown in Fig. 1 to shut off the supply of heated air drawnin through the heater 12 and to permit air to be drawn into thecarbureter directly from the atmosphere through the port 17, thisatmospheric air being, of course, cooler than the air drawn through theheater. When the cooler air strikes the element it willcorrespondinglycontract and the shutter 19 will be partially raised and this adjustmentof the shutter by the element will be continued until the proper mixtureof air of the predetermined temperature has been reached.

While I have shown and described in detail the embodiments of myinvention which appear, at the present time, to be most desirable, itwill be apparent that various changes in the shape, construction andarrangement of the various parts may be resorted to Without departingfrom the spirit or sacrificing any of the material advantages of theinvention.

I claim:

The combination of a carbureter, a pipe for supplying air thereto, apipe connecte With said carbureter for conveying carbureted air from thecarbureter to an engine cylinder, means including a shutter ar ranged inthe air supply pipe to the carbureter for regulating the relativeproportions of hot and cold air supplied to the carbureter through saidpipe, temperature actuated means located in the carbureted air pipe,and. connections including a bell crank lever and suitable links betweenthe temperature actuated means and said shutter whereby the shutter iscontrolled from said temperature actuated means to regulate thetemperature of the air delivered to the carbureter.

JAMES B. LUND.

Witnesses: v

IRA J. WILSON, M. ROBERTSON.

